change of vocabulary.

I want to replace all my IF's with WHEN's. and all my THINK's with KNOW's.

Here's some examples.

yeah if i go to the mall, i want this shirt.
yeah, when i go to the mall, i want this shirt.

two extra letters; much more life.

i think i know what to do.
i know i know what to do.

i never really understood the difference between these two sentences, and trust me, i still don't...but because everyone else see's one, im sure i want to be on the side thats saying KNOW instead of the side that say's THINK.

anyways, please correct me when i dont follow this through. im a work in progress, and i KNOW you are too.